Densities for mixtures containing sunflower seed oil with pentane,
hexane, heptane, and octane have
been determined at various temperatures between 298.15 K and 313.15 K
using a vibrating tube
densimeter. The derived excess volumes have been correlated by the
Redlich−Kister equation. All the
systems showed negative deviations from ideality. The excess
volumes increased with an increase in
temperature.
Densities, refractive indices, and speeds of sound at 298.15 K and isobaric vapor−liquid equilibria (VLE)
data at 101.3 kPa were reported for the binary mixtures containing ethyl acetate + 1-pentanol and ethanol
+ 2-methyl-1-propanol. Excess molar volumes, refractive index deviations, and changes of speed of sound
on mixing were calculated from the measurement results that were fitted with Redlich−Kister polynomials.
VLE experimental data were tested for thermodynamic consistency by means of a modified Dechema
test and were demonstrated to be consistent. The activity coefficients were correlated with the Margules,
van Laar, UNIQUAC, nonrandom two-liquid, and Wilson equations. The analytical solution of groups
model also was used for prediction.
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